The Efficacy and Safety of PRTX007-003 Combined With Pembrolizumab in Resectable Stage III Melanoma
Recruiting now · Phase 2
Conditions studied: Melanoma Stage III
In brief
This Phase 2, multi-center, single-arm study evaluates the safety, tolerability, and activity of neoadjuvant PRTX007 in combination with pembrolizumab in participants with resectable Stage III melanoma. Neoadjuvant immunotherapy has demonstrated improved clinical outcomes compared with adjuvant-only approaches, but there remains a need to enhance pathologic response rates without significant added toxicity. Participants will receive oral PRTX007, a Toll-like receptor 7 (TLR7) agonist prodrug, administered in combination with intravenous pembrolizumab prior to surgical resection. The primary objective is to determine the major pathologic response (MPR) rate following neoadjuvant therapy. Secondary objectives include evaluation of safety, pathologic complete response, event-free survival, overall survival, pharmacokinetics, and immune-related biomarkers. This study aims to determine whether the addition of PRTX007 to pembrolizumab improves antitumor immune responses and clinical outcomes in patients with Stage III melanoma.
Key facts
- Study ID
- NCT07565285
- Run by
- Primmune Therapeutics, Inc.
- People needed
- 48
- Starts
- 2026-07-01
- Expected to finish
- 2029-06-01
- Last updated by the study team
- 2026-07-29
Who can join
Age: 18 and older. Sex: any. Healthy volunteers: not accepted.
You may qualify if…
- Adults aged 18 years or older
- Histologically confirmed, resectable Stage III cutaneous melanoma.
- Candidate for curative-intent surgical resection
- Eastern Cooperative Oncology Group (ECOG) performance status of 0-2
- Adequate organ function
- Able to provide written informed consent
You may not qualify if…
- Prior systemic therapy for melanoma, including immunotherapy
- Uveal melanoma or mucosal melanoma.
- Active autoimmune disease requiring systemic treatment
- Primary immunodeficiency or use of systemic immunosuppressive therapy
- Women who are pregnant or breastfeeding
- Recent treatment with another investigational therapy
- Any condition that, in the opinion of the investigator, would interfere with study participation or safety
Where it is running
- Calvary Mater Newcastle — Waratah, New South Wales, Australia (enrolling)
- Gallipoli Medical Research — Greenslopes, Queensland, Australia
- Princess Alexandra Hospital — Woolloongabba, Queensland, Australia
- Peter MacCallum Cancer Centre — Melbourne, Victoria, Australia
- One Clinical Research Pty Ltd — Nedlands, Western Australia, Australia
Full record on ClinicalTrials.gov
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